Nonmetallic gear wheel and the like



because of cost.

' important in the case of automoblle timing Patented Dec. 1, 1931UNITED STATES PATENT OFFICE CLARENCE W. MANSUR, OF MALDEN,MASSACHUSETTS, ASSIGNOR TO GENERAL ELEC- TRIO COMPANY, A CORPORATION OFNEW YORK NONMETALLIC GEAR WHEEL AND THE LIKE Application fi1ed May 21,

5 adhesive binder such as a phenolic Condensation product. In such adevice it is desirable that the Webs be made as thin as possibleconsistent With the desired strength both because of lightness of thecompleted structure and These factors are especially gears, for example,Which is one extensive application for gear Wheels of this type.

The object of my invention 1s to provide an improved Web structure for anon-metallic gear'wheel or the like, Whereby the Web may be made thinnerthan heretofore, thereby reducing the cost of manufacture because of thesaving of material, and still have ample 'm strength in the Web itselfin both the circumferential direction and in a direction at a rightangle to the plane of the Web.

For a consideration of What I believe to be novel and my invention,attention is directed to the following specification and the claimsappended thereto.

In the drawings, Fig. 1 is a perspective view of a gear Wheel blankembodying my invention, and Fig. 2 is a radial sectional view 0 of theconstruction shown in Fig. 1.

Referring to the drawings, 1 indicates the rim of a gear Wheel blank, 2indicates the Web, and 3 indicates the hub, the hub being shown as beingprovided With a central opening 4 to receiveia metal bushing. In thepresent instance the blank is shown as being formed from Woven textilematerial united by a suitable adhesive. It is to be understood, however,that the construction shown is to be taken as typical of any suitablenon-metallic gear Wheel construction, and that it may be constructedfrom either vvoven or unwoven material or partly from one and partlyfrom the other.

In connection With such gear Wheel structures, I have discovered thatthe strength of the Web may be materiallv increased by constructing theWeb With radially extending offset portions as is indicated at 5, whichextend throughout substantially the radial depth of 1930. Serial No.454,462.

the Web. Preferably the offset portions extend outwardly to each side ofthe normal plane of the Web, successive offset portions being oppositelyarranged. Also, the offset portions are made of small axial depthcompared to the thickness of the Web; of considerable circumferentialWidth compared to the diameter of the Web, and With their edges 6extending radially. By small axial depth I mean a depth of the order ofone-half the thickness of the Web. There is thus provided relativelythin, Wide, radially extending offset portions. This I regard as beingan important feature of the structure because With this arrangement Iadd substantially to the stiffness and strength of the Web Withoutreducing its ability to Withstand stresses in a circumferentialdirection and Without introducing any difliculties as regards themolding of the structure.

lVhat I claim as new and desirc to secure by Letters Patent of theUnited States is l. A non-metallic gear Wheel blank or the like having aWeb provided With radially extending offset portions extendingthroughout substantially the radial depth of the Web.

2. A non-metallic gear Wheel blank or the like having a Web providedWith radially extending offset portions of small axial depth extendingthroughout substantially the radial depth of the Web.

3. A non-metallic gear Wheel blank or the like having a Web providedWith radially extending offset portions of small axial depth andconsiderable r-,ircumferential Width extending throughout substantiallythe radial depth of the Web.

In witness Whereof, I have hereunto set my hand this th day of May,1930.

CLARENCE IV. MANSUR.

